Conveners
Parallel session B4
- Izabela Ciepał (Institute of Nuclear Physics PAS)
This work presents the first comprehensive study of inclusive Σ(1385)± hyperon production in proton–proton collisions at a kinetic beam energy of 4.5 GeV, performed with the High-Acceptance Di-Electron Spectrometer (HADES) at GSI. The Σ(1385)± resonances were reconstructed via their dominant hadronic decay channels Σ(1385)± → Λπ±, with subsequent Λ → pπ- decay. Extraction of a clean signal was...
Recent experiments have discovered various exotic hadrons near scattering thresholds, stimulating interest in their internal structure. For short-range $s$-wave interactions, the structure of near-threshold states has been clarified based on the low-energy universality: shallow bound states below threshold tend to be dominated by the hadronic molecular component [1], whereas narrow resonances...
The description of short-lived resonances in high-energy physics is commonly based on the relativistic Breit–Wigner spectral function, which, despite its phenomenological success, does not satisfy certain fundamental constraints, most notably the presence of a non-zero energy threshold. More consistent approaches are therefore required; one such alternative is the Sill distribution (see, e.g.,...
Recent progress in both theory and experiment has left the unitarity of the quark mixing matrix (CKM) somewhat of an open question. The Nab experiment at the Spallation Neutron Source is designed to improve precision of the extraction of the first matrix element and shed light on experimental tensions within the neutron beta decay dataset. Nab’s asymmetric spectrometer allows coincident...
